Stop-cock



K. KLINGER Aug. 4, 1931.

STOPCOCK Filed May 23. 1929 Patented Aug. 4, 1931 UNITED STATES PATENT OFFICE KARL KLINGER, 'OF GUMPOLDSKIRCHEN, AUSTRIA STOP-COCK Application led May 23, 1929, Serial No. 365,469, and in Austria .Tune 1, 1928.

The invention relates to a stop-cock of the kind, in which a cylindrical packing member consisting of a mass which is practically hard but plastic to a certain extent and made of asbestos and graphite isjinserted between the plug and the cock casing, this cylindrical packing member being somewhat upset when pressure is exerted upon its base surface and thereby firmly tigh'tened against cock and casing;

' In structuresemploying short tubes having cylindrical internal and external surfaces, these tubes will not stay in place, and will rotate and shift in the packing cylinder 1.5 when the packing is compressed on its4 ends to tighten` it. Furthermore, 'this compression will deform the hole in which the tubes e are seated by reason of 'the compressng force not being uniformly distributed around the hole's so that the packing material will not closely contact around these tubes at all points.

To avoid these disadvantages I have made A. the exterior surfaces of these tubes wedgeshaped'so that the wedges lie in the direction of the compression pressure.

S'uch an arrangement prevents rotaton and displacement of the tubes and permits the material of the packing to be displaced 3. and compressed about the tubes without leavin them at any point oftheir circumference.

The invention is'shown by way of example in the accompanying drawings, Wherein Fig. 1. is a Vertical section and Fig. 2. is a section on the line 2 '2 of Fig. 1.

Fig. 3 shows the cylindrical packing member in a perspective view with inserted metal ieces being symmetrically wedge-shaped on oth sides.

Fig. 4 is a view of a cylindrical member with inserted metal pieces wedge-shaped on their one side.

The. cock 'casin 1 has a borewhich is so large that the cylmdrical acking member 3 made of asbestos and grap 'ite can be putbetween the casing and the plug 2. The cylindrical packing member abutting against the screw 5 of the handle 6 is capable of being deformed to such extent by a 'threaded cap 4 to be screwed into the casing 1, that it is firmly tightened with its surfaces against the casing 1 and the plug 2, thereby securing complete tightening even with high pressure.

The cylindrical packing member 3 is provided wlth openings 9 and 10 corresponding vto the channels in the casing not formed in vthe plastic mass itself but in metal pieces 11 and 12 inserted in the latter, whereby corrosion of 'the plastic mass by the fiuid pa'ssing through is avoided.

According to the invention the metal pieces 11 and 12 are wedge-shaped, thereby assuring lthe above mentioned advantages. Fig. 3 shows a cylindrical packing member with inserted metal pieces Wedge-shaped on both sides provided with openings 9 and 10 in order to permit the fiuid to pass. Fig. 4 shows another modification of the metal pieces which in this case are Wedge-shaped on one side. By the annular part of the metal pieces secures an efiicient abutment against the packing member and are so inserted into the hard, but slightly compressible packing cylinder that the wedge extends in the direction of compression on the cylinder parallel to the axis of the cylinder.

In order to assure the correct position of the packing member and of its openings with respect to the channels of the cock casing, if necessary, a slot 14 is provided in the cock casin 1 with which a ledge 13 at the correspon vin place of the cyhndrical member 3l may be rought into engagement. I

What I claim is 1. A stop-cock of the type specified having a slightly compressible sleeve of packing material inserted between the plug and the casing of the cock, said sleeve being provided with openings, and metal bodies being inserted within said sleeve in said openings,

the outer wall of each of the metal bodies ben'g wedge-shaped and /said wedges extending parallel to the axis of 'the sleeve.

2. A stop-cock having a compressible' pack- 6 ing between the plug and casing of the cock. in combination with tubular metal bodies having'r openin s therethrough nserted in and extending .t rough the packing and having opposite external wedge-shaped portions directed in the line of compression.

In testimony that I claimthe foregoing as my invention, I have signed my name.

KARL KLINGER! 

